mysql - How to define a date interval in a compatible way? -

-

I am trying to create SQL query, which is both on HSQL V2 .2.4) and MySQL (v5.1.36) server (if this can also run on DB2V9, this would be a wonderful bonus!)

is the query: 

  Select the document count (*), where current_data - cast (date indexed as date) & lt; =?   
 (here  current_date  is a standard HSQL / MySQL function and  indexing_date  is a column type  datetime  Parameter ?  is replaced by integer  20 ).  
 The problem is that MySQL gives the difference between the date while HSQL returns  
 Additionally HSQL supports this syntax (but not MySQL):  
 Select the  count (*) from the document where the date (indexing_date as date) is current_data - between 20 days and the current date   
 While MySQL does not do I have information in MySQL Let me, but as I said the solution should be interoperated.   
 
 
 HSQLda also supports it:  
  (*) Where current_data - cast (indexing_date as date) & lt; Select cast (*) from = cast (in the form of interval day)   
 and  
  document where the date (date format) between the current date In index date) - '20' day and current_data   
 or  
  select count (*) from document where indexing_date & gt; = Current_date - Interval '20' day   
 In addition to version 2.2.6, HSQLDB supports  DATEDIFF (Datewalla, DebVilube) , which is two Returns the number of days between dates, as well as  day (datewise) , which gives the number of days since the era.

Comments

Post a Comment

Popular posts from this blog

mysql - BLOB/TEXT column 'value' used in key specification without a key length -

-
I have developed an extension which works up to 1.6 on Magren (I'm trying Enterprise Edition, And I think the community is the same problem, because it is the same code). In my install script, I see the $ installer-> gt; CreateEntityTables ($ this- & gt; getTable ('alphanum / info')); The installation is done until it is not in the _text unit table. It crashed there! It turns out that when I log in to SQL and run it via PHPmyadmin, then this error is: Blob / Text column 'value' is used without the key 'key' . I saw the code there, and this is what is trying to create an index on the value column: -> addIndex ($ this- & gt; getIdxName ($ eavTableName, array ( 'attribute_id array (' attribute_id ',' value ')) - & gt; addIndex ($ this- & gt; getIdxName ($ eavTableName, array (' entity_type_id ' , 'Value')), array ('entity_type_id', 'value')) If there is no if statement is n...
Read more

c# - Using Vici cool Storage with monodroid -

-
Oh, for the moment I am not sure how it is officially supported, but for the success of the people Using Monodroid Vic Cool Storage I am able to leave and compile assemblies in my project, but while trying to use some classes, the errors of time have to be gathered. Especially when trying to connect like the example for Mono Touch string dbName = path. Cobain (environment. Gatefolder path (environment specialfolder personal), "mydb.db3"); // The following line will be called coolestation, where is the database, // to make it if it does not exist, and call a delegate that creates the necessary tables (only when the database file was newly created //) CSConfig.SetDB (DbName, true, () => {CSDatabase.ExecuteNonQuery ("Subscriber Integer Primary Key Attribute, Name Text (50) No, Number, Date First Text (30)");); There is no difference when I try to use the methods of CSConfig and when I cscfif If I try to pass 3 aggregates to STDB (3) then I get the invalid ...
Read more

c# - Confused over DLL entry points (entry point not found exception) -

-
I'm learning how to use DLL in C #. I have a very simple DLL to do my basic test. // using the MainForm.cs system; Using System.Collections.Generic; Using System.ComponentModel; Using System.Data; Using System.Drawing; Using System.Linq; Using System.Text; Using System.Windows.Forms; Using System.Runtime.InteropServices; Namespace DLL_Test {public partial class} Form 1: Form {{DllImport ("TestDLL.dll", EntryPoint = "? @ @ YGHHH Add @, Accurate Spelling = True, Calling Communication = Calling Conference. STCL}] Add public static extern int ( Int a, int b); public form 1 () {initialization ();} private zeros button 1_Click (object sender, eventArgs e) {int num; try {num = add (2, 3); RichTextBox1.AppendText (num. ToString () + "\ n");} Hold (DllNotFoundException Pre) {Message Box.Show (ex.ToString ());} Hold (EntryPointNotFoundException Pre) {Message Box.Show (ex.ToString ())}} }} more DLL code: // TestDLL.cpp __declspec (dllexport) Add int __std...
Read more